Windows 7:
I have given a complete solution here for python selenium webdriver
1. Setup easy install (windows - simplified)
a. download ez.setup.py (https://bootstrap.pypa.io/ez_setup.py) from 'https://pypi.python.org/pypi/setuptools'
b. move ez.setup.py to C:\Python27\
c. open cmd prompt
d. cd C:\Python27\
e. C:\Python27\python.exe ez.setup.py install